When error Cannot lock down 82274202 byte memory area appears when using Jack, use the following command to enable real time processing.

~]# dpkg-reconfigure -p high jackd22

A pop-up box will appear. Select Yes to enable real time processing.

Add your user account to the audio group.

~]# adduser your_username audio

Restart the Jackd service.

~]# service jackd restart

Ensure the Jackd service is running.

~]# service jackd status